Patents Examined by Ricardo M. Pizzaro
  • Patent number: 6714560
    Abstract: A method of and apparatus for transmitting SS7 signals between a single node (such as, for example, Service Control Points (SCPs), Service Switching Points (SSPs) and Signalling Transfer Points (STPs)) and a plurality of other nodes is disclosed. The method involves connecting a node to an Asynchronous Transfer Mode (ATM) network through a High Speed Link (HSL). A virtual channel for each of the other nodes connected to the ATM network is provisioned on the HSL. Each channel is identified by a Virtual Path Identifier (VPI) and Virtual Channel Identifier (VCI) pair. SS7 signalling data from the single node will be encapsulated with the VCI+VPI pair in an ATM cell and transmitted on the HSL to the ATM network where the ATM cell is transmitted to another node over a Permanent Virtual Circuit (PVC) or Switch Virtual Channel (SVC).
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: March 30, 2004
    Assignee: Nortel Networks Limited
    Inventors: Calvin E. Drover, Naile S. Daoud, Guy G. Mousseau
  • Patent number: 6463074
    Abstract: A technique for a time division multiplex system in which access to shared broadcast communication media is granted on a demand basis. Particular connections are assigned slot times at the transmitter based on demand. However, no specific information regarding the assignment of time slots need be communicated to the receivers. The transmit side employs a forward error correction technique followed by multiplication by a cover sequence unique to each connection. All receivers listen to the broadcast transmission channel all of the time. The receiver assigned to each connection decodes the signals in such a manner that only the receiver with the correct cover sequence assigned to a particular connection will successfully decode the data associated with that connection. Data frames that fail the forward error correction process are discarded, and only those frames which are successfully decoded are passed up to a higher layer.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: October 8, 2002
    Assignee: Tantivy Communications, Inc.
    Inventors: Kevin P. Johnson, Antoine J. Rouphael
  • Patent number: 6222825
    Abstract: Apparatus and method for more precise controlling of congestion on a network, provides for remote controlling of a remote station on the network by a local station to configure the remote station into a remote loopback configuration. With the remote station thus configured, the local station is then able to determine the link latency of the link, during auto-negotiation, for example. Provided with the link latency, a congestion control algorithm in the local station may be adjusted to account for the link latency to better control the input data streams by controlling when the congestion relieving control signal, such as a PAUSE frame, is transmitted to the remote station to inhibit transmission and relieve congestion.
    Type: Grant
    Filed: January 23, 1997
    Date of Patent: April 24, 2001
    Assignee: Advanced Micro Devices, Inc.
    Inventors: James Mangin, Jayant Kadambi, Mohan Kalkunte, Shashank C. Merchant
  • Patent number: 5959979
    Abstract: Data transmission by a half-duplex transceiver over a full-duplex cellular telephone system using the EIA/TIA-553 standard is achieved by monitoring the forward channel to synchronize the transceiver with the forward channel signal, switching to transmit mode to transmit data on the reverse channel, and momentarily switching back to receive mode during the transmission at the projected times of occurrence of significant status bits on the forward channel in order to detect status bits whose timing controls operation of the transceiver.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: September 28, 1999
    Assignee: Northrop Grumman Corporation
    Inventor: Scott Alan Stratmoen